36(2x-y)^2 - 25(u-2y)^2 thanks
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,583 Sep 8, 2005 #2 Note that m - n = -(n - m), and that (-1)<sup>2</sup> = 1. Then factor the difference of squares. Eliz.
Note that m - n = -(n - m), and that (-1)<sup>2</sup> = 1. Then factor the difference of squares. Eliz.